-96.7% is the change from 455 to 15
Calculation steps:
[( 15 - 455 ) ÷ 455] x 100 = -96.7%
Formula
Percentage change = [(15 - 455) / 455] x 100
Subtract the new number by the original number
15 - 455 = -440
-440 ÷ 455 = -0.967032967032967
-0.967032967032967 x 100 = -96.7%